Chemotherapy Combined With Radiotherapy Versus Radiotherapy Alone for Solitary Plasmacytoma

Inclusion Criteria: * treatment-naïve SP. Exclusion Criteria: * Not appropriate for radiotherapy. * ECOG \> 2. * Co-morbidity of uncontrolled infection. * Co-morbidity of other active malignancy. * Patients in pregnancy or lactation. * Prior or concurrent pulmonary embolism. * Patients not able to tolerate thrombosis prophylaxis, bortezomib, lenalidomide or dexamethasone. * Seropositive for human immunodeficiency virus, seropositive for hepatitis C, or HBV-DNA \> 1000 copies/mL. * Myocardial infarction, NYHA Class III or IV heart failure, uncontrolled angina, severe uncontrolled arrhythmias within 6 months prior to enrollment. * Grade 2 or higher neuropathy according to National Cancer Institute Common Terminology Criteria for Adverse Events. * Neutrophil \<1×10E9/L，hemoglobin \< 8g/dL，or platelet \< 75×10E9/L. * Severely compromised hepatic or renal function: ALT or AST \> 3 × ULN, total bilirubin \> 1.5 × ULN，or eGFR \< 40mL/min.